So ive been working on my MP3DP and i got a new arduino mega 2567 and uploaded the firmware to it.

i plugged in the device into the shield and connected the stepper motors, drivers, and the thermistor to make sure it worked. i double checked my wiring and everything is wired correctly from what i can see.

i started repeiter-host and the X, Y, and Z all move in one direction but not in the opposite direction.

check you endstops if they’re being triggered properly. Disable your steppers in LCD, manually move your axes where it will hit the endstops and send M119 on repeiter-host. See if x,y,z were TRIGGERED when you hit them manually. If they are getting triggered, were you able to Autohome?